linux-kernel - Re: [RFC] mm: change find

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Message-ID: <20151215115342.GB75130@black.fi.intel.com>
Date:	Tue, 15 Dec 2015 13:53:42 +0200
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	yalin wang <yalin.wang2010@...il.com>
Cc:	"Kirill A. Shutemov" <kirill@...temov.name>,
	Oleg Nesterov <oleg@...hat.com>, akpm@...ux-foundation.org,
	gang.chen.5i5j@...il.com, mhocko@...e.com,
	kwapulinski.piotr@...il.com, aarcange@...hat.com,
	dcashman@...gle.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] mm: change find_vma() function

On Tue, Dec 15, 2015 at 02:41:21PM +0800, yalin wang wrote:
> > On Dec 15, 2015, at 05:11, Kirill A. Shutemov <kirill@...temov.name> wrote:
> > Anyway, I don't think it's possible to gain anything measurable from this
> > optimization.
> > 
> the advantage is that if addr don’t belong to any vma, we don’t need loop all vma,
> we can break earlier if we found the most closest vma which vma->end_add > addr,

Do you have any workload which can demonstrate the advantage?

-- 
 Kirill A. Shutemov
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